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Chevrolet Impala Real World MPG

117 messages,  Last post on Apr 15, 2009 at 11:28 AM

You are in the Chevrolet Impala Forum. Your Hosts are pat & karens

What is this discussion about? Chevrolet Impala, Fuel Efficiency (MPG), Sedan


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#31 of 117
2006 Impala LT 3.5 Gas mileage by wremote
Jun 29, 2006 (6:37 am)
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I have a 06 Impala LT 3.5l with 3000 Miles on it. I get 26 MPG US mixed, and 32 MPG US Highway. I Expect better once I have more miles on it!!! Had A Saturn ION Quad Coup that did slightly better.(29/34) I'll Take the Impala any Day
#32 of 117
Break In time by quig
Jul 01, 2006 (12:40 am)
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I just bought a new Impala Lt 3.5 the book says break in at 500 miles should not the break in be a little more than that. and what speed should I drive it at for a good break in.
Thanks
Quig
#33 of 117
Re: Break In time [quig] by nosirrahg
Jul 01, 2006 (11:31 am)
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Replying to: quig (Jul 01, 2006 12:40 am)

The most important thing to avoid is driving at one constant speed for an extended period of time. Don't use your cruise control, and stay off Interstates if you can. I'd probably avoid driving over 60MPH if possible...maybe take a long trip over the holiday on a two-lane backroad somewhere!
#34 of 117
Re: Break In time [nosirrahg] by quig
Jul 01, 2006 (4:43 pm)
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Replying to: nosirrahg (Jul 01, 2006 11:31 am)

Thanks Nosirrahg
Quig.
#35 of 117
3000 miles & mileage is getting better by zizith
Jul 13, 2006 (3:01 pm)
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On straight highway driving I get 32 + a tenth or two, and 26 in town averaging about 28. I wanted to downsize from the minivan due to the gas prices (and with the middle east thing getting shakier again, it will go up some more.) Going 70 mpg drops it down to 28mpg.
 
I am pleased with the mileage--after reading so many posts in edmunds, I was beginning to think that nothing but Toyotas and Hondas could get good gas mileage. I was brought up in a junk yard in Iowa, and learned to prefer Chevys, and I still do; they have usually served me VERY well over the years.
 
This one is white with lots of pinks stripes and decals, so if you ever see one like that, please wave, as there probably aren't many out there with that color combo. zmartha
#36 of 117
Re: 3000 miles & mileage is getting better [zizith] by quig
Jul 13, 2006 (4:36 pm)
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Replying to: zizith (Jul 13, 2006 3:01 pm)

Hi question I bought a new 3.5 Lt 2 at what mileage point did you start driving over 60 to 70 MPH highway driving.(What was your mileage break in point)
 
Thank you
Quig
#37 of 117
Re: 3000 miles & mileage is getting better [zizith] by priggly
Jul 13, 2006 (10:50 pm)
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Replying to: zizith (Jul 13, 2006 3:01 pm)

I am pleased with the mileage--after reading so many posts in edmunds, I was beginning to think that nothing but Toyotas and Hondas could get good gas mileage.
 
I have a new SS which has less than 1,700 miles on the odometer and am currently getting 31-32 miles per US gallon at a steady 60 mph on the highway. In the city the mileage is 17-18 mpg. These numbers are exactly in line or better than EPA estimates. The car is simply great and I could not be happier with it!
#38 of 117
Re: 3000 miles & mileage is getting better [priggly] by timothyaw
Jul 14, 2006 (5:19 am)
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Replying to: priggly (Jul 13, 2006 10:50 pm)

60 mph?? That's pretty slow on todays American freeways! You'll get ran over, literally! With that big V8, you're wasting it only going 60!
 
Toyota's and Honda's get low to mid 30's going 70, 75!
#39 of 117
Re: 3000 miles & mileage is getting better [timothyaw] by quietpro
Jul 14, 2006 (6:29 pm)
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Replying to: timothyaw (Jul 14, 2006 5:19 am)

Toyota's and Honda's get low to mid 30's going 70, 75!
 
Yeah, and it only takes them twice as long to get up to that speed.
#40 of 117
Idling by bxd
Jul 18, 2006 (8:01 am)
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Replying to: quietpro (Jun 23, 2006 6:03 pm)

I don't have any hard data, but I can help you think this through somewhat. Would be nice if someone could find some manufacturer's data on it.
 
Take car "A", gets 30mph on the highway, like the Impala. That means about 2 gallons per hour burned. Now that is at about 3 times the RPM of simply idling.
 
So one hour of idling would consume 2/3 gallon of gas IF the engine load was similar. Which it isn't - even if the AC is on the engine has it easy just idling compared to going down the highway.
 
So my (admittedly rough) guess would be about 1/2 gallon of gas per hour of idling. Maybe I'm missing some other factor that someone will point out, but I think RPMs and engine load (which affects fuel injector duty cycles) pretty much sums up gas usage.

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